cat nodesedit

The nodes command shows the cluster topology. For example

GET /_cat/nodes?v

Might look like:

ip        heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
127.0.0.1           65          99  42    3.07                  mdi       *      mJw06l1

The first few columns (ip, heap.percent, ram.percent, cpu, load_*) tell you where your nodes live and give a quick picture of performance stats.

The last (node.role, master, and name) columns provide ancillary information that can often be useful when looking at the cluster as a whole, particularly large ones. How many master-eligible nodes do I have?

Columnsedit

Below is an exhaustive list of the existing headers that can be passed to nodes?h= to retrieve the relevant details in ordered columns. If no headers are specified, then those marked to Appear by Default will appear. If any header is specified, then the defaults are not used.

Aliases can be used in place of the full header name for brevity. Columns appear in the order that they are listed below unless a different order is specified (e.g., h=pid,id versus h=id,pid).

When specifying headers, the headers are not placed in the output by default. To have the headers appear in the output, use verbose mode (v). The header name will match the supplied value (e.g., pid versus p). For example:

GET /_cat/nodes?v&h=id,ip,port,v,m

Might look like:

id   ip        port  v         m
veJR 127.0.0.1 59938 6.0.0-alpha2 *
Header Alias Appear by Default Description Example

id

nodeId

No

Unique node ID

k0zy

pid

p

No

Process ID

13061

ip

i

Yes

IP address

127.0.1.1

port

po

No

Bound transport port

9300

http_address

http

No

Bound http address

127.0.0.1:9200

version

v

No

Elasticsearch version

6.0.0-alpha2

build

b

No

Elasticsearch Build hash

5c03844

jdk

j

No

Running Java version

1.8.0

disk.avail

d, disk, diskAvail

No

Available disk space

1.8gb

heap.current

hc, heapCurrent

No

Used heap

311.2mb

heap.percent

hp, heapPercent

Yes

Used heap percentage

7

heap.max

hm, heapMax

No

Maximum configured heap

1015.6mb

ram.current

rc, ramCurrent

No

Used total memory

513.4mb

ram.percent

rp, ramPercent

Yes

Used total memory percentage

47

ram.max

rm, ramMax

No

Total memory

2.9gb

file_desc.current

fdc, fileDescriptorCurrent

No

Used file descriptors

123

file_desc.percent

fdp, fileDescriptorPercent

Yes

Used file descriptors percentage

1

file_desc.max

fdm, fileDescriptorMax

No

Maximum number of file descriptors

1024

cpu

No

Recent system CPU usage as percent

12

load_1m

l

No

Most recent load average

0.22

load_5m

l

No

Load average for the last five minutes

0.78

load_15m

l

No

Load average for the last fifteen minutes

1.24

uptime

u

No

Node uptime

17.3m

node.role

r, role, nodeRole

Yes

Master eligible node (m); Data node (d); Ingest node (i); Coordinating node only (-)

mdi

master

m

Yes

Elected master (*); Not elected master (-)

*

name

n

Yes

Node name

I8hydUG

completion.size

cs, completionSize

No

Size of completion

0b

fielddata.memory_size

fm, fielddataMemory

No

Used fielddata cache memory

0b

fielddata.evictions

fe, fielddataEvictions

No

Fielddata cache evictions

0

query_cache.memory_size

qcm, queryCacheMemory

No

Used query cache memory

0b

query_cache.evictions

qce, queryCacheEvictions

No

Query cache evictions

0

request_cache.memory_size

rcm, requestCacheMemory

No

Used request cache memory

0b

request_cache.evictions

rce, requestCacheEvictions

No

Request cache evictions

0

request_cache.hit_count

rchc, requestCacheHitCount

No

Request cache hit count

0

request_cache.miss_count

rcmc, requestCacheMissCount

No

Request cache miss count

0

flush.total

ft, flushTotal

No

Number of flushes

1

flush.total_time

ftt, flushTotalTime

No

Time spent in flush

1

get.current

gc, getCurrent

No

Number of current get operations

0

get.time

gti, getTime

No

Time spent in get

14ms

get.total

gto, getTotal

No

Number of get operations

2

get.exists_time

geti, getExistsTime

No

Time spent in successful gets

14ms

get.exists_total

geto, getExistsTotal

No

Number of successful get operations

2

get.missing_time

gmti, getMissingTime

No

Time spent in failed gets

0s

get.missing_total

gmto, getMissingTotal

No

Number of failed get operations

1

indexing.delete_current

idc, indexingDeleteCurrent

No

Number of current deletion operations

0

indexing.delete_time

idti, indexingDeleteTime

No

Time spent in deletions

2ms

indexing.delete_total

idto, indexingDeleteTotal

No

Number of deletion operations

2

indexing.index_current

iic, indexingIndexCurrent

No

Number of current indexing operations

0

indexing.index_time

iiti, indexingIndexTime

No

Time spent in indexing

134ms

indexing.index_total

iito, indexingIndexTotal

No

Number of indexing operations

1

indexing.index_failed

iif, indexingIndexFailed

No

Number of failed indexing operations

0

merges.current

mc, mergesCurrent

No

Number of current merge operations

0

merges.current_docs

mcd, mergesCurrentDocs

No

Number of current merging documents

0

merges.current_size

mcs, mergesCurrentSize

No

Size of current merges

0b

merges.total

mt, mergesTotal

No

Number of completed merge operations

0

merges.total_docs

mtd, mergesTotalDocs

No

Number of merged documents

0

merges.total_size

mts, mergesTotalSize

No

Size of current merges

0b

merges.total_time

mtt, mergesTotalTime

No

Time spent merging documents

0s

refresh.total

rto, refreshTotal

No

Number of refreshes

16

refresh.time

rti, refreshTime

No

Time spent in refreshes

91ms

script.compilations

scrcc, scriptCompilations

No

Total script compilations

17

script.cache_evictions

scrce, scriptCacheEvictions

No

Total compiled scripts evicted from cache

6

search.fetch_current

sfc, searchFetchCurrent

No

Current fetch phase operations

0

search.fetch_time

sfti, searchFetchTime

No

Time spent in fetch phase

37ms

search.fetch_total

sfto, searchFetchTotal

No

Number of fetch operations

7

search.open_contexts

so, searchOpenContexts

No

Open search contexts

0

search.query_current

sqc, searchQueryCurrent

No

Current query phase operations

0

search.query_time

sqti, searchQueryTime

No

Time spent in query phase

43ms

search.query_total

sqto, searchQueryTotal

No

Number of query operations

9

search.scroll_current

scc, searchScrollCurrent

No

Open scroll contexts

2

search.scroll_time

scti, searchScrollTime

No

Time scroll contexts held open

2m

search.scroll_total

scto, searchScrollTotal

No

Completed scroll contexts

1

segments.count

sc, segmentsCount

No

Number of segments

4

segments.memory

sm, segmentsMemory

No

Memory used by segments

1.4kb

segments.index_writer_memory

siwm, segmentsIndexWriterMemory

No

Memory used by index writer

18mb

segments.version_map_memory

svmm, segmentsVersionMapMemory

No

Memory used by version map

1.0kb

segments.fixed_bitset_memory

sfbm, fixedBitsetMemory

No

Memory used by fixed bit sets for nested object field types and type filters for types referred in _parent fields

1.0kb

suggest.current

suc, suggestCurrent

No

Number of current suggest operations

0

suggest.time

suti, suggestTime

No

Time spent in suggest

0

suggest.total

suto, suggestTotal

No

Number of suggest operations

0